Looking to uograde my GPU. Unfortunately I think Nvidia is getring my business this time around since a 580 isnt much faster than my 290. But checking out availablity on ANYTHING worth buying... Im seeing everything is sold out. But then I see that miners I guess are paying north of 500 bucks for used 290s? Is this right? Also ... guys... keep me on team red. I dont wanna go to a geforce but Im tired of driver issues and I want a significant performance increase. Is it even worth considering Vega????